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From Gordon Sim <g...@redhat.com>
Subject Re: Getting "[Broker] warning Exception on notification of dequeue" What does this mean ?
Date Fri, 01 Feb 2013 08:59:31 GMT
On 01/31/2013 06:39 PM, Rajesh Khan wrote:
> Gordon , any suggestion what might be causing this warning exception ?

It comes from some internal error around the tracking of the aggregate 
queue size. When a message is enqueued the size is incremented, when the 
message is dequeued the size is decremented. This error indicates and 
attempt to dequeue more data than it was actually aware of, which means 
something internally is broken.

> This exception shows up in the broker after an hour of running my
> application.
> I did try setting up a queu with max size = 0 using the following command
>
> *python qpid-config add queue LVQTest-5Min-3 --argument
> qpid.last_value_queue_key=MChartSymbol --max-queue-size=0*

If there is no maximum size then you couldn't get the same message as 
the size counter would not be tracked. Perhaps the setting didn't get 
passed through correctly... Does qpid-config queues echo the correct 
settings back to you?


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